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linux_dsm_epyc7002/drivers/media/video/em28xx/em28xx-video.c
Hans Verkuil 5126f2590b [media] v4l2-dev: add flag to have the core lock all file operations 
This used to be the default if the lock pointer was set, but now that lock is by
default only used for ioctl serialization. Those drivers that already used
core locking have this flag set explicitly, except for some drivers where
it was obvious that there was no need to serialize any file operations other
than ioctl.

The drivers that didn't need this flag were:

drivers/media/radio/dsbr100.c
drivers/media/radio/radio-isa.c
drivers/media/radio/radio-keene.c
drivers/media/radio/radio-miropcm20.c
drivers/media/radio/radio-mr800.c
drivers/media/radio/radio-tea5764.c
drivers/media/radio/radio-timb.c
drivers/media/video/vivi.c
sound/i2c/other/tea575x-tuner.c

The other drivers that use core locking and where it was not immediately
obvious that this flag wasn't needed were changed so that the flag is set
together with a comment that that driver needs work to avoid having to
set that flag. This will often involve taking the core lock in the fops
themselves.

Eventually this flag should go and it should not be used in new drivers.

There are a few reasons why we want to avoid core locking of non-ioctl
fops: in the case of mmap this can lead to a deadlock in rare situations
since when mmap is called the mmap_sem is held and it is possible for
other parts of the code to take that lock as well (copy_from_user()/copy_to_user()
perform a down_read(&mm->mmap_sem) when a page fault occurs).

It is very unlikely that that happens since the core lock serializes all
fops, but the kernel warns about it if lock validation is turned on.

For poll it is also undesirable to take the core lock as that can introduce
increased latency. The same is true for read/write.

While it was possible to make flags or something to turn on/off taking the
core lock for each file operation, in practice it is much simpler to just
not take it at all except for ioctl and leave it to the driver to take the
lock. There are only a handful fops compared to the zillion ioctls we have.

I also wanted to make it obvious which drivers still take the lock for all
fops, so that's why I chose to have drivers set it explicitly.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-14 09:19:38 -03:00

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/*
em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
video capture devices
Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
Markus Rechberger <mrechberger@gmail.com>
Mauro Carvalho Chehab <mchehab@infradead.org>
Sascha Sommer <saschasommer@freenet.de>
Some parts based on SN9C10x PC Camera Controllers GPL driver made
by Luca Risolia <luca.risolia@studio.unibo.it>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/bitmap.h>
#include <linux/usb.h>
#include <linux/i2c.h>
#include <linux/mm.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include "em28xx.h"
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-chip-ident.h>
#include <media/msp3400.h>
#include <media/tuner.h>
#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
"Markus Rechberger <mrechberger@gmail.com>, " \
"Mauro Carvalho Chehab <mchehab@infradead.org>, " \
"Sascha Sommer <saschasommer@freenet.de>"
#define DRIVER_DESC "Empia em28xx based USB video device driver"
#define EM28XX_VERSION "0.1.3"
#define em28xx_videodbg(fmt, arg...) do {\
if (video_debug) \
printk(KERN_INFO "%s %s :"fmt, \
dev->name, __func__ , ##arg); } while (0)
static unsigned int isoc_debug;
module_param(isoc_debug, int, 0644);
MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
#define em28xx_isocdbg(fmt, arg...) \
do {\
if (isoc_debug) { \
printk(KERN_INFO "%s %s :"fmt, \
dev->name, __func__ , ##arg); \
} \
} while (0)
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_VERSION(EM28XX_VERSION);
static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
module_param_array(video_nr, int, NULL, 0444);
module_param_array(vbi_nr, int, NULL, 0444);
module_param_array(radio_nr, int, NULL, 0444);
MODULE_PARM_DESC(video_nr, "video device numbers");
MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
MODULE_PARM_DESC(radio_nr, "radio device numbers");
static unsigned int video_debug;
module_param(video_debug, int, 0644);
MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
/* supported video standards */
static struct em28xx_fmt format[] = {
{
.name = "16 bpp YUY2, 4:2:2, packed",
.fourcc = V4L2_PIX_FMT_YUYV,
.depth = 16,
.reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
}, {
.name = "16 bpp RGB 565, LE",
.fourcc = V4L2_PIX_FMT_RGB565,
.depth = 16,
.reg = EM28XX_OUTFMT_RGB_16_656,
}, {
.name = "8 bpp Bayer BGBG..GRGR",
.fourcc = V4L2_PIX_FMT_SBGGR8,
.depth = 8,
.reg = EM28XX_OUTFMT_RGB_8_BGBG,
}, {
.name = "8 bpp Bayer GRGR..BGBG",
.fourcc = V4L2_PIX_FMT_SGRBG8,
.depth = 8,
.reg = EM28XX_OUTFMT_RGB_8_GRGR,
}, {
.name = "8 bpp Bayer GBGB..RGRG",
.fourcc = V4L2_PIX_FMT_SGBRG8,
.depth = 8,
.reg = EM28XX_OUTFMT_RGB_8_GBGB,
}, {
.name = "12 bpp YUV411",
.fourcc = V4L2_PIX_FMT_YUV411P,
.depth = 12,
.reg = EM28XX_OUTFMT_YUV411,
},
};
/* supported controls */
/* Common to all boards */
static struct v4l2_queryctrl ac97_qctrl[] = {
{
.id = V4L2_CID_AUDIO_VOLUME,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Volume",
.minimum = 0x0,
.maximum = 0x1f,
.step = 0x1,
.default_value = 0x1f,
.flags = V4L2_CTRL_FLAG_SLIDER,
}, {
.id = V4L2_CID_AUDIO_MUTE,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Mute",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 1,
.flags = 0,
}
};
/* ------------------------------------------------------------------
DMA and thread functions
------------------------------------------------------------------*/
/*
* Announces that a buffer were filled and request the next
*/
static inline void buffer_filled(struct em28xx *dev,
struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer *buf)
{
/* Advice that buffer was filled */
em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
buf->vb.state = VIDEOBUF_DONE;
buf->vb.field_count++;
do_gettimeofday(&buf->vb.ts);
dev->isoc_ctl.vid_buf = NULL;
list_del(&buf->vb.queue);
wake_up(&buf->vb.done);
}
static inline void vbi_buffer_filled(struct em28xx *dev,
struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer *buf)
{
/* Advice that buffer was filled */
em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
buf->vb.state = VIDEOBUF_DONE;
buf->vb.field_count++;
do_gettimeofday(&buf->vb.ts);
dev->isoc_ctl.vbi_buf = NULL;
list_del(&buf->vb.queue);
wake_up(&buf->vb.done);
}
/*
* Identify the buffer header type and properly handles
*/
static void em28xx_copy_video(struct em28xx *dev,
struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer *buf,
unsigned char *p,
unsigned char *outp, unsigned long len)
{
void *fieldstart, *startwrite, *startread;
int linesdone, currlinedone, offset, lencopy, remain;
int bytesperline = dev->width << 1;
if (dma_q->pos + len > buf->vb.size)
len = buf->vb.size - dma_q->pos;
startread = p;
remain = len;
if (dev->progressive)
fieldstart = outp;
else {
/* Interlaces two half frames */
if (buf->top_field)
fieldstart = outp;
else
fieldstart = outp + bytesperline;
}
linesdone = dma_q->pos / bytesperline;
currlinedone = dma_q->pos % bytesperline;
if (dev->progressive)
offset = linesdone * bytesperline + currlinedone;
else
offset = linesdone * bytesperline * 2 + currlinedone;
startwrite = fieldstart + offset;
lencopy = bytesperline - currlinedone;
lencopy = lencopy > remain ? remain : lencopy;
if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
((char *)startwrite + lencopy) -
((char *)outp + buf->vb.size));
remain = (char *)outp + buf->vb.size - (char *)startwrite;
lencopy = remain;
}
if (lencopy <= 0)
return;
memcpy(startwrite, startread, lencopy);
remain -= lencopy;
while (remain > 0) {
startwrite += lencopy + bytesperline;
startread += lencopy;
if (bytesperline > remain)
lencopy = remain;
else
lencopy = bytesperline;
if ((char *)startwrite + lencopy > (char *)outp +
buf->vb.size) {
em28xx_isocdbg("Overflow of %zi bytes past buffer end"
"(2)\n",
((char *)startwrite + lencopy) -
((char *)outp + buf->vb.size));
lencopy = remain = (char *)outp + buf->vb.size -
(char *)startwrite;
}
if (lencopy <= 0)
break;
memcpy(startwrite, startread, lencopy);
remain -= lencopy;
}
dma_q->pos += len;
}
static void em28xx_copy_vbi(struct em28xx *dev,
struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer *buf,
unsigned char *p,
unsigned char *outp, unsigned long len)
{
void *startwrite, *startread;
int offset;
int bytesperline;
if (dev == NULL) {
em28xx_isocdbg("dev is null\n");
return;
}
bytesperline = dev->vbi_width;
if (dma_q == NULL) {
em28xx_isocdbg("dma_q is null\n");
return;
}
if (buf == NULL) {
return;
}
if (p == NULL) {
em28xx_isocdbg("p is null\n");
return;
}
if (outp == NULL) {
em28xx_isocdbg("outp is null\n");
return;
}
if (dma_q->pos + len > buf->vb.size)
len = buf->vb.size - dma_q->pos;
startread = p;
startwrite = outp + dma_q->pos;
offset = dma_q->pos;
/* Make sure the bottom field populates the second half of the frame */
if (buf->top_field == 0) {
startwrite += bytesperline * dev->vbi_height;
offset += bytesperline * dev->vbi_height;
}
memcpy(startwrite, startread, len);
dma_q->pos += len;
}
static inline void print_err_status(struct em28xx *dev,
int packet, int status)
{
char *errmsg = "Unknown";
switch (status) {
case -ENOENT:
errmsg = "unlinked synchronuously";
break;
case -ECONNRESET:
errmsg = "unlinked asynchronuously";
break;
case -ENOSR:
errmsg = "Buffer error (overrun)";
break;
case -EPIPE:
errmsg = "Stalled (device not responding)";
break;
case -EOVERFLOW:
errmsg = "Babble (bad cable?)";
break;
case -EPROTO:
errmsg = "Bit-stuff error (bad cable?)";
break;
case -EILSEQ:
errmsg = "CRC/Timeout (could be anything)";
break;
case -ETIME:
errmsg = "Device does not respond";
break;
}
if (packet < 0) {
em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
} else {
em28xx_isocdbg("URB packet %d, status %d [%s].\n",
packet, status, errmsg);
}
}
/*
* video-buf generic routine to get the next available buffer
*/
static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer **buf)
{
struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
char *outp;
if (list_empty(&dma_q->active)) {
em28xx_isocdbg("No active queue to serve\n");
dev->isoc_ctl.vid_buf = NULL;
*buf = NULL;
return;
}
/* Get the next buffer */
*buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
/* Cleans up buffer - Useful for testing for frame/URB loss */
outp = videobuf_to_vmalloc(&(*buf)->vb);
memset(outp, 0, (*buf)->vb.size);
dev->isoc_ctl.vid_buf = *buf;
return;
}
/*
* video-buf generic routine to get the next available VBI buffer
*/
static inline void vbi_get_next_buf(struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer **buf)
{
struct em28xx *dev = container_of(dma_q, struct em28xx, vbiq);
char *outp;
if (list_empty(&dma_q->active)) {
em28xx_isocdbg("No active queue to serve\n");
dev->isoc_ctl.vbi_buf = NULL;
*buf = NULL;
return;
}
/* Get the next buffer */
*buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
/* Cleans up buffer - Useful for testing for frame/URB loss */
outp = videobuf_to_vmalloc(&(*buf)->vb);
memset(outp, 0x00, (*buf)->vb.size);
dev->isoc_ctl.vbi_buf = *buf;
return;
}
/*
* Controls the isoc copy of each urb packet
*/
static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
{
struct em28xx_buffer *buf;
struct em28xx_dmaqueue *dma_q = &dev->vidq;
unsigned char *outp = NULL;
int i, len = 0, rc = 1;
unsigned char *p;
if (!dev)
return 0;
if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
return 0;
if (urb->status < 0) {
print_err_status(dev, -1, urb->status);
if (urb->status == -ENOENT)
return 0;
}
buf = dev->isoc_ctl.vid_buf;
if (buf != NULL)
outp = videobuf_to_vmalloc(&buf->vb);
for (i = 0; i < urb->number_of_packets; i++) {
int status = urb->iso_frame_desc[i].status;
if (status < 0) {
print_err_status(dev, i, status);
if (urb->iso_frame_desc[i].status != -EPROTO)
continue;
}
len = urb->iso_frame_desc[i].actual_length - 4;
if (urb->iso_frame_desc[i].actual_length <= 0) {
/* em28xx_isocdbg("packet %d is empty",i); - spammy */
continue;
}
if (urb->iso_frame_desc[i].actual_length >
dev->max_pkt_size) {
em28xx_isocdbg("packet bigger than packet size");
continue;
}
p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
/* FIXME: incomplete buffer checks where removed to make
logic simpler. Impacts of those changes should be evaluated
*/
if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
em28xx_isocdbg("VBI HEADER!!!\n");
/* FIXME: Should add vbi copy */
continue;
}
if (p[0] == 0x22 && p[1] == 0x5a) {
em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
len, (p[2] & 1) ? "odd" : "even");
if (dev->progressive || !(p[2] & 1)) {
if (buf != NULL)
buffer_filled(dev, dma_q, buf);
get_next_buf(dma_q, &buf);
if (buf == NULL)
outp = NULL;
else
outp = videobuf_to_vmalloc(&buf->vb);
}
if (buf != NULL) {
if (p[2] & 1)
buf->top_field = 0;
else
buf->top_field = 1;
}
dma_q->pos = 0;
}
if (buf != NULL) {
if (p[0] != 0x88 && p[0] != 0x22) {
em28xx_isocdbg("frame is not complete\n");
len += 4;
} else {
p += 4;
}
em28xx_copy_video(dev, dma_q, buf, p, outp, len);
}
}
return rc;
}
/* Version of isoc handler that takes into account a mixture of video and
VBI data */
static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb)
{
struct em28xx_buffer *buf, *vbi_buf;
struct em28xx_dmaqueue *dma_q = &dev->vidq;
struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
unsigned char *outp = NULL;
unsigned char *vbioutp = NULL;
int i, len = 0, rc = 1;
unsigned char *p;
int vbi_size;
if (!dev)
return 0;
if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
return 0;
if (urb->status < 0) {
print_err_status(dev, -1, urb->status);
if (urb->status == -ENOENT)
return 0;
}
buf = dev->isoc_ctl.vid_buf;
if (buf != NULL)
outp = videobuf_to_vmalloc(&buf->vb);
vbi_buf = dev->isoc_ctl.vbi_buf;
if (vbi_buf != NULL)
vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
for (i = 0; i < urb->number_of_packets; i++) {
int status = urb->iso_frame_desc[i].status;
if (status < 0) {
print_err_status(dev, i, status);
if (urb->iso_frame_desc[i].status != -EPROTO)
continue;
}
len = urb->iso_frame_desc[i].actual_length;
if (urb->iso_frame_desc[i].actual_length <= 0) {
/* em28xx_isocdbg("packet %d is empty",i); - spammy */
continue;
}
if (urb->iso_frame_desc[i].actual_length >
dev->max_pkt_size) {
em28xx_isocdbg("packet bigger than packet size");
continue;
}
p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
/* capture type 0 = vbi start
capture type 1 = video start
capture type 2 = video in progress */
if (p[0] == 0x33 && p[1] == 0x95) {
dev->capture_type = 0;
dev->vbi_read = 0;
em28xx_isocdbg("VBI START HEADER!!!\n");
dev->cur_field = p[2];
p += 4;
len -= 4;
} else if (p[0] == 0x88 && p[1] == 0x88 &&
p[2] == 0x88 && p[3] == 0x88) {
/* continuation */
p += 4;
len -= 4;
} else if (p[0] == 0x22 && p[1] == 0x5a) {
/* start video */
p += 4;
len -= 4;
}
vbi_size = dev->vbi_width * dev->vbi_height;
if (dev->capture_type == 0) {
if (dev->vbi_read >= vbi_size) {
/* We've already read all the VBI data, so
treat the rest as video */
em28xx_isocdbg("dev->vbi_read > vbi_size\n");
} else if ((dev->vbi_read + len) < vbi_size) {
/* This entire frame is VBI data */
if (dev->vbi_read == 0 &&
(!(dev->cur_field & 1))) {
/* Brand new frame */
if (vbi_buf != NULL)
vbi_buffer_filled(dev,
vbi_dma_q,
vbi_buf);
vbi_get_next_buf(vbi_dma_q, &vbi_buf);
if (vbi_buf == NULL)
vbioutp = NULL;
else
vbioutp = videobuf_to_vmalloc(
&vbi_buf->vb);
}
if (dev->vbi_read == 0) {
vbi_dma_q->pos = 0;
if (vbi_buf != NULL) {
if (dev->cur_field & 1)
vbi_buf->top_field = 0;
else
vbi_buf->top_field = 1;
}
}
dev->vbi_read += len;
em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
vbioutp, len);
} else {
/* Some of this frame is VBI data and some is
video data */
int vbi_data_len = vbi_size - dev->vbi_read;
dev->vbi_read += vbi_data_len;
em28xx_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
vbioutp, vbi_data_len);
dev->capture_type = 1;
p += vbi_data_len;
len -= vbi_data_len;
}
}
if (dev->capture_type == 1) {
dev->capture_type = 2;
if (dev->progressive || !(dev->cur_field & 1)) {
if (buf != NULL)
buffer_filled(dev, dma_q, buf);
get_next_buf(dma_q, &buf);
if (buf == NULL)
outp = NULL;
else
outp = videobuf_to_vmalloc(&buf->vb);
}
if (buf != NULL) {
if (dev->cur_field & 1)
buf->top_field = 0;
else
buf->top_field = 1;
}
dma_q->pos = 0;
}
if (buf != NULL && dev->capture_type == 2) {
if (len >= 4 && p[0] == 0x88 && p[1] == 0x88 &&
p[2] == 0x88 && p[3] == 0x88) {
p += 4;
len -= 4;
}
if (len >= 4 && p[0] == 0x22 && p[1] == 0x5a) {
em28xx_isocdbg("Video frame %d, len=%i, %s\n",
p[2], len, (p[2] & 1) ?
"odd" : "even");
p += 4;
len -= 4;
}
if (len > 0)
em28xx_copy_video(dev, dma_q, buf, p, outp,
len);
}
}
return rc;
}
/* ------------------------------------------------------------------
Videobuf operations
------------------------------------------------------------------*/
static int
buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
{
struct em28xx_fh *fh = vq->priv_data;
struct em28xx *dev = fh->dev;
struct v4l2_frequency f;
*size = (fh->dev->width * fh->dev->height * dev->format->depth + 7)
>> 3;
if (0 == *count)
*count = EM28XX_DEF_BUF;
if (*count < EM28XX_MIN_BUF)
*count = EM28XX_MIN_BUF;
/* Ask tuner to go to analog or radio mode */
memset(&f, 0, sizeof(f));
f.frequency = dev->ctl_freq;
f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
return 0;
}
/* This is called *without* dev->slock held; please keep it that way */
static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
{
struct em28xx_fh *fh = vq->priv_data;
struct em28xx *dev = fh->dev;
unsigned long flags = 0;
if (in_interrupt())
BUG();
/* We used to wait for the buffer to finish here, but this didn't work
because, as we were keeping the state as VIDEOBUF_QUEUED,
videobuf_queue_cancel marked it as finished for us.
(Also, it could wedge forever if the hardware was misconfigured.)
This should be safe; by the time we get here, the buffer isn't
queued anymore. If we ever start marking the buffers as
VIDEOBUF_ACTIVE, it won't be, though.
*/
spin_lock_irqsave(&dev->slock, flags);
if (dev->isoc_ctl.vid_buf == buf)
dev->isoc_ctl.vid_buf = NULL;
spin_unlock_irqrestore(&dev->slock, flags);
videobuf_vmalloc_free(&buf->vb);
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
static int
buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct em28xx_fh *fh = vq->priv_data;
struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
struct em28xx *dev = fh->dev;
int rc = 0, urb_init = 0;
buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth
+ 7) >> 3;
if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
return -EINVAL;
buf->vb.width = dev->width;
buf->vb.height = dev->height;
buf->vb.field = field;
if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
rc = videobuf_iolock(vq, &buf->vb, NULL);
if (rc < 0)
goto fail;
}
if (!dev->isoc_ctl.analog_bufs.num_bufs)
urb_init = 1;
if (urb_init) {
if (em28xx_vbi_supported(dev) == 1)
rc = em28xx_init_isoc(dev, EM28XX_ANALOG_MODE,
EM28XX_NUM_PACKETS,
EM28XX_NUM_BUFS,
dev->max_pkt_size,
em28xx_isoc_copy_vbi);
else
rc = em28xx_init_isoc(dev, EM28XX_ANALOG_MODE,
EM28XX_NUM_PACKETS,
EM28XX_NUM_BUFS,
dev->max_pkt_size,
em28xx_isoc_copy);
if (rc < 0)
goto fail;
}
buf->vb.state = VIDEOBUF_PREPARED;
return 0;
fail:
free_buffer(vq, buf);
return rc;
}
static void
buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
struct em28xx_buffer *buf = container_of(vb,
struct em28xx_buffer,
vb);
struct em28xx_fh *fh = vq->priv_data;
struct em28xx *dev = fh->dev;
struct em28xx_dmaqueue *vidq = &dev->vidq;
buf->vb.state = VIDEOBUF_QUEUED;
list_add_tail(&buf->vb.queue, &vidq->active);
}
static void buffer_release(struct videobuf_queue *vq,
struct videobuf_buffer *vb)
{
struct em28xx_buffer *buf = container_of(vb,
struct em28xx_buffer,
vb);
struct em28xx_fh *fh = vq->priv_data;
struct em28xx *dev = (struct em28xx *)fh->dev;
em28xx_isocdbg("em28xx: called buffer_release\n");
free_buffer(vq, buf);
}
static struct videobuf_queue_ops em28xx_video_qops = {
.buf_setup = buffer_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.buf_release = buffer_release,
};
/********************* v4l2 interface **************************************/
static void video_mux(struct em28xx *dev, int index)
{
dev->ctl_input = index;
dev->ctl_ainput = INPUT(index)->amux;
dev->ctl_aoutput = INPUT(index)->aout;
if (!dev->ctl_aoutput)
dev->ctl_aoutput = EM28XX_AOUT_MASTER;
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
INPUT(index)->vmux, 0, 0);
if (dev->board.has_msp34xx) {
if (dev->i2s_speed) {
v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
s_i2s_clock_freq, dev->i2s_speed);
}
/* Note: this is msp3400 specific */
v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
}
if (dev->board.adecoder != EM28XX_NOADECODER) {
v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
dev->ctl_ainput, dev->ctl_aoutput, 0);
}
em28xx_audio_analog_set(dev);
}
/* Usage lock check functions */
static int res_get(struct em28xx_fh *fh, unsigned int bit)
{
struct em28xx *dev = fh->dev;
if (fh->resources & bit)
/* have it already allocated */
return 1;
/* is it free? */
if (dev->resources & bit) {
/* no, someone else uses it */
return 0;
}
/* it's free, grab it */
fh->resources |= bit;
dev->resources |= bit;
em28xx_videodbg("res: get %d\n", bit);
return 1;
}
static int res_check(struct em28xx_fh *fh, unsigned int bit)
{
return fh->resources & bit;
}
static int res_locked(struct em28xx *dev, unsigned int bit)
{
return dev->resources & bit;
}
static void res_free(struct em28xx_fh *fh, unsigned int bits)
{
struct em28xx *dev = fh->dev;
BUG_ON((fh->resources & bits) != bits);
fh->resources &= ~bits;
dev->resources &= ~bits;
em28xx_videodbg("res: put %d\n", bits);
}
static int get_ressource(struct em28xx_fh *fh)
{
switch (fh->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
return EM28XX_RESOURCE_VIDEO;
case V4L2_BUF_TYPE_VBI_CAPTURE:
return EM28XX_RESOURCE_VBI;
default:
BUG();
return 0;
}
}
/*
* ac97_queryctrl()
* return the ac97 supported controls
*/
static int ac97_queryctrl(struct v4l2_queryctrl *qc)
{
int i;
for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
if (qc->id && qc->id == ac97_qctrl[i].id) {
memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
return 0;
}
}
/* Control is not ac97 related */
return 1;
}
/*
* ac97_get_ctrl()
* return the current values for ac97 mute and volume
*/
static int ac97_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
{
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = dev->mute;
return 0;
case V4L2_CID_AUDIO_VOLUME:
ctrl->value = dev->volume;
return 0;
default:
/* Control is not ac97 related */
return 1;
}
}
/*
* ac97_set_ctrl()
* set values for ac97 mute and volume
*/
static int ac97_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
{
int i;
for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++)
if (ctrl->id == ac97_qctrl[i].id)
goto handle;
/* Announce that hasn't handle it */
return 1;
handle:
if (ctrl->value < ac97_qctrl[i].minimum ||
ctrl->value > ac97_qctrl[i].maximum)
return -ERANGE;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
dev->mute = ctrl->value;
break;
case V4L2_CID_AUDIO_VOLUME:
dev->volume = ctrl->value;
break;
}
return em28xx_audio_analog_set(dev);
}
static int check_dev(struct em28xx *dev)
{
if (dev->state & DEV_DISCONNECTED) {
em28xx_errdev("v4l2 ioctl: device not present\n");
return -ENODEV;
}
if (dev->state & DEV_MISCONFIGURED) {
em28xx_errdev("v4l2 ioctl: device is misconfigured; "
"close and open it again\n");
return -EIO;
}
return 0;
}
static void get_scale(struct em28xx *dev,
unsigned int width, unsigned int height,
unsigned int *hscale, unsigned int *vscale)
{
unsigned int maxw = norm_maxw(dev);
unsigned int maxh = norm_maxh(dev);
*hscale = (((unsigned long)maxw) << 12) / width - 4096L;
if (*hscale >= 0x4000)
*hscale = 0x3fff;
*vscale = (((unsigned long)maxh) << 12) / height - 4096L;
if (*vscale >= 0x4000)
*vscale = 0x3fff;
}
/* ------------------------------------------------------------------
IOCTL vidioc handling
------------------------------------------------------------------*/
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
f->fmt.pix.width = dev->width;
f->fmt.pix.height = dev->height;
f->fmt.pix.pixelformat = dev->format->fourcc;
f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
/* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
if (dev->progressive)
f->fmt.pix.field = V4L2_FIELD_NONE;
else
f->fmt.pix.field = dev->interlaced ?
V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
return 0;
}
static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(format); i++)
if (format[i].fourcc == fourcc)
return &format[i];
return NULL;
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
unsigned int width = f->fmt.pix.width;
unsigned int height = f->fmt.pix.height;
unsigned int maxw = norm_maxw(dev);
unsigned int maxh = norm_maxh(dev);
unsigned int hscale, vscale;
struct em28xx_fmt *fmt;
fmt = format_by_fourcc(f->fmt.pix.pixelformat);
if (!fmt) {
em28xx_videodbg("Fourcc format (%08x) invalid.\n",
f->fmt.pix.pixelformat);
return -EINVAL;
}
if (dev->board.is_em2800) {
/* the em2800 can only scale down to 50% */
height = height > (3 * maxh / 4) ? maxh : maxh / 2;
width = width > (3 * maxw / 4) ? maxw : maxw / 2;
/* MaxPacketSize for em2800 is too small to capture at full resolution
* use half of maxw as the scaler can only scale to 50% */
if (width == maxw && height == maxh)
width /= 2;
} else {
/* width must even because of the YUYV format
height must be even because of interlacing */
v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
1, 0);
}
get_scale(dev, width, height, &hscale, &vscale);
width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
f->fmt.pix.width = width;
f->fmt.pix.height = height;
f->fmt.pix.pixelformat = fmt->fourcc;
f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
if (dev->progressive)
f->fmt.pix.field = V4L2_FIELD_NONE;
else
f->fmt.pix.field = dev->interlaced ?
V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
return 0;
}
static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
unsigned width, unsigned height)
{
struct em28xx_fmt *fmt;
fmt = format_by_fourcc(fourcc);
if (!fmt)
return -EINVAL;
dev->format = fmt;
dev->width = width;
dev->height = height;
/* set new image size */
get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
em28xx_set_alternate(dev);
em28xx_resolution_set(dev);
return 0;
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
vidioc_try_fmt_vid_cap(file, priv, f);
if (videobuf_queue_is_busy(&fh->vb_vidq)) {
em28xx_errdev("%s queue busy\n", __func__);
return -EBUSY;
}
return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
f->fmt.pix.width, f->fmt.pix.height);
}
static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
*norm = dev->norm;
return 0;
}
static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm);
return 0;
}
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
struct v4l2_format f;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
dev->norm = *norm;
/* Adjusts width/height, if needed */
f.fmt.pix.width = dev->width;
f.fmt.pix.height = dev->height;
vidioc_try_fmt_vid_cap(file, priv, &f);
/* set new image size */
dev->width = f.fmt.pix.width;
dev->height = f.fmt.pix.height;
get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
em28xx_resolution_set(dev);
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
return 0;
}
static int vidioc_g_parm(struct file *file, void *priv,
struct v4l2_streamparm *p)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc = 0;
if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (dev->board.is_webcam)
rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
video, g_parm, p);
else
v4l2_video_std_frame_period(dev->norm,
&p->parm.capture.timeperframe);
return rc;
}
static int vidioc_s_parm(struct file *file, void *priv,
struct v4l2_streamparm *p)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
if (!dev->board.is_webcam)
return -EINVAL;
if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
}
static const char *iname[] = {
[EM28XX_VMUX_COMPOSITE1] = "Composite1",
[EM28XX_VMUX_COMPOSITE2] = "Composite2",
[EM28XX_VMUX_COMPOSITE3] = "Composite3",
[EM28XX_VMUX_COMPOSITE4] = "Composite4",
[EM28XX_VMUX_SVIDEO] = "S-Video",
[EM28XX_VMUX_TELEVISION] = "Television",
[EM28XX_VMUX_CABLE] = "Cable TV",
[EM28XX_VMUX_DVB] = "DVB",
[EM28XX_VMUX_DEBUG] = "for debug only",
};
static int vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
unsigned int n;
n = i->index;
if (n >= MAX_EM28XX_INPUT)
return -EINVAL;
if (0 == INPUT(n)->type)
return -EINVAL;
i->index = n;
i->type = V4L2_INPUT_TYPE_CAMERA;
strcpy(i->name, iname[INPUT(n)->type]);
if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
(EM28XX_VMUX_CABLE == INPUT(n)->type))
i->type = V4L2_INPUT_TYPE_TUNER;
i->std = dev->vdev->tvnorms;
return 0;
}
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
*i = dev->ctl_input;
return 0;
}
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (i >= MAX_EM28XX_INPUT)
return -EINVAL;
if (0 == INPUT(i)->type)
return -EINVAL;
video_mux(dev, i);
return 0;
}
static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
if (!dev->audio_mode.has_audio)
return -EINVAL;
switch (a->index) {
case EM28XX_AMUX_VIDEO:
strcpy(a->name, "Television");
break;
case EM28XX_AMUX_LINE_IN:
strcpy(a->name, "Line In");
break;
case EM28XX_AMUX_VIDEO2:
strcpy(a->name, "Television alt");
break;
case EM28XX_AMUX_PHONE:
strcpy(a->name, "Phone");
break;
case EM28XX_AMUX_MIC:
strcpy(a->name, "Mic");
break;
case EM28XX_AMUX_CD:
strcpy(a->name, "CD");
break;
case EM28XX_AMUX_AUX:
strcpy(a->name, "Aux");
break;
case EM28XX_AMUX_PCM_OUT:
strcpy(a->name, "PCM");
break;
default:
return -EINVAL;
}
a->index = dev->ctl_ainput;
a->capability = V4L2_AUDCAP_STEREO;
return 0;
}
static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
if (!dev->audio_mode.has_audio)
return -EINVAL;
if (a->index >= MAX_EM28XX_INPUT)
return -EINVAL;
if (0 == INPUT(a->index)->type)
return -EINVAL;
dev->ctl_ainput = INPUT(a->index)->amux;
dev->ctl_aoutput = INPUT(a->index)->aout;
if (!dev->ctl_aoutput)
dev->ctl_aoutput = EM28XX_AOUT_MASTER;
return 0;
}
static int vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int id = qc->id;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
memset(qc, 0, sizeof(*qc));
qc->id = id;
/* enumerate AC97 controls */
if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
rc = ac97_queryctrl(qc);
if (!rc)
return 0;
}
/* enumerate V4L2 device controls */
v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
if (qc->type)
return 0;
else
return -EINVAL;
}
/*
* FIXME: This is an indirect way to check if a control exists at a
* subdev. Instead of that hack, maybe the better would be to change all
* subdevs to return -ENOIOCTLCMD, if an ioctl is not supported.
*/
static int check_subdev_ctrl(struct em28xx *dev, int id)
{
struct v4l2_queryctrl qc;
memset(&qc, 0, sizeof(qc));
qc.id = id;
/* enumerate V4L2 device controls */
v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, &qc);
if (qc.type)
return 0;
else
return -EINVAL;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
rc = 0;
/* Set an AC97 control */
if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
rc = ac97_get_ctrl(dev, ctrl);
else
rc = 1;
/* It were not an AC97 control. Sends it to the v4l2 dev interface */
if (rc == 1) {
if (check_subdev_ctrl(dev, ctrl->id))
return -EINVAL;
v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
rc = 0;
}
return rc;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
/* Set an AC97 control */
if (dev->audio_mode.ac97 != EM28XX_NO_AC97)
rc = ac97_set_ctrl(dev, ctrl);
else
rc = 1;
/* It isn't an AC97 control. Sends it to the v4l2 dev interface */
if (rc == 1) {
rc = check_subdev_ctrl(dev, ctrl->id);
if (!rc)
v4l2_device_call_all(&dev->v4l2_dev, 0,
core, s_ctrl, ctrl);
/*
* In the case of non-AC97 volume controls, we still need
* to do some setups at em28xx, in order to mute/unmute
* and to adjust audio volume. However, the value ranges
* should be checked by the corresponding V4L subdriver.
*/
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
dev->mute = ctrl->value;
rc = em28xx_audio_analog_set(dev);
break;
case V4L2_CID_AUDIO_VOLUME:
dev->volume = ctrl->value;
rc = em28xx_audio_analog_set(dev);
}
}
return (rc < 0) ? rc : 0;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (0 != t->index)
return -EINVAL;
strcpy(t->name, "Tuner");
t->type = V4L2_TUNER_ANALOG_TV;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (0 != t->index)
return -EINVAL;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
f->frequency = dev->ctl_freq;
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (0 != f->tuner)
return -EINVAL;
if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
return -EINVAL;
if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
return -EINVAL;
dev->ctl_freq = f->frequency;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int em28xx_reg_len(int reg)
{
switch (reg) {
case EM28XX_R40_AC97LSB:
case EM28XX_R30_HSCALELOW:
case EM28XX_R32_VSCALELOW:
return 2;
default:
return 1;
}
}
static int vidioc_g_chip_ident(struct file *file, void *priv,
struct v4l2_dbg_chip_ident *chip)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
chip->ident = V4L2_IDENT_NONE;
chip->revision = 0;
v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
return 0;
}
static int vidioc_g_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int ret;
switch (reg->match.type) {
case V4L2_CHIP_MATCH_AC97:
ret = em28xx_read_ac97(dev, reg->reg);
if (ret < 0)
return ret;
reg->val = ret;
reg->size = 1;
return 0;
case V4L2_CHIP_MATCH_I2C_DRIVER:
v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
return 0;
case V4L2_CHIP_MATCH_I2C_ADDR:
/* TODO: is this correct? */
v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
return 0;
default:
if (!v4l2_chip_match_host(&reg->match))
return -EINVAL;
}
/* Match host */
reg->size = em28xx_reg_len(reg->reg);
if (reg->size == 1) {
ret = em28xx_read_reg(dev, reg->reg);
if (ret < 0)
return ret;
reg->val = ret;
} else {
__le16 val = 0;
ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
reg->reg, (char *)&val, 2);
if (ret < 0)
return ret;
reg->val = le16_to_cpu(val);
}
return 0;
}
static int vidioc_s_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
__le16 buf;
switch (reg->match.type) {
case V4L2_CHIP_MATCH_AC97:
return em28xx_write_ac97(dev, reg->reg, reg->val);
case V4L2_CHIP_MATCH_I2C_DRIVER:
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
return 0;
case V4L2_CHIP_MATCH_I2C_ADDR:
/* TODO: is this correct? */
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
return 0;
default:
if (!v4l2_chip_match_host(&reg->match))
return -EINVAL;
}
/* Match host */
buf = cpu_to_le16(reg->val);
return em28xx_write_regs(dev, reg->reg, (char *)&buf,
em28xx_reg_len(reg->reg));
}
#endif
static int vidioc_cropcap(struct file *file, void *priv,
struct v4l2_cropcap *cc)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
cc->bounds.left = 0;
cc->bounds.top = 0;
cc->bounds.width = dev->width;
cc->bounds.height = dev->height;
cc->defrect = cc->bounds;
cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
cc->pixelaspect.denominator = 59;
return 0;
}
static int vidioc_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc = -EINVAL;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (unlikely(type != fh->type))
return -EINVAL;
em28xx_videodbg("vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
fh, type, fh->resources, dev->resources);
if (unlikely(!res_get(fh, get_ressource(fh))))
return -EBUSY;
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
rc = videobuf_streamon(&fh->vb_vidq);
else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
rc = videobuf_streamon(&fh->vb_vbiq);
return rc;
}
static int vidioc_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
return -EINVAL;
if (type != fh->type)
return -EINVAL;
em28xx_videodbg("vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
fh, type, fh->resources, dev->resources);
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
videobuf_streamoff(&fh->vb_vidq);
res_free(fh, EM28XX_RESOURCE_VIDEO);
}
} else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
if (res_check(fh, EM28XX_RESOURCE_VBI)) {
videobuf_streamoff(&fh->vb_vbiq);
res_free(fh, EM28XX_RESOURCE_VBI);
}
}
return 0;
}
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
cap->capabilities =
V4L2_CAP_SLICED_VBI_CAPTURE |
V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
if (dev->vbi_dev)
cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
if (dev->audio_mode.has_audio)
cap->capabilities |= V4L2_CAP_AUDIO;
if (dev->tuner_type != TUNER_ABSENT)
cap->capabilities |= V4L2_CAP_TUNER;
return 0;
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
if (unlikely(f->index >= ARRAY_SIZE(format)))
return -EINVAL;
strlcpy(f->description, format[f->index].name, sizeof(f->description));
f->pixelformat = format[f->index].fourcc;
return 0;
}
static int vidioc_enum_framesizes(struct file *file, void *priv,
struct v4l2_frmsizeenum *fsize)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
struct em28xx_fmt *fmt;
unsigned int maxw = norm_maxw(dev);
unsigned int maxh = norm_maxh(dev);
fmt = format_by_fourcc(fsize->pixel_format);
if (!fmt) {
em28xx_videodbg("Fourcc format (%08x) invalid.\n",
fsize->pixel_format);
return -EINVAL;
}
if (dev->board.is_em2800) {
if (fsize->index > 1)
return -EINVAL;
fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
fsize->discrete.width = maxw / (1 + fsize->index);
fsize->discrete.height = maxh / (1 + fsize->index);
return 0;
}
if (fsize->index != 0)
return -EINVAL;
/* Report a continuous range */
fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
fsize->stepwise.min_width = 48;
fsize->stepwise.min_height = 32;
fsize->stepwise.max_width = maxw;
fsize->stepwise.max_height = maxh;
fsize->stepwise.step_width = 1;
fsize->stepwise.step_height = 1;
return 0;
}
/* Sliced VBI ioctls */
static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
f->fmt.sliced.service_set = 0;
v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
if (f->fmt.sliced.service_set == 0)
rc = -EINVAL;
return rc;
}
static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
v4l2_device_call_all(&dev->v4l2_dev, 0, vbi, g_sliced_fmt, &f->fmt.sliced);
if (f->fmt.sliced.service_set == 0)
return -EINVAL;
return 0;
}
/* RAW VBI ioctls */
static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
struct v4l2_format *format)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
format->fmt.vbi.samples_per_line = dev->vbi_width;
format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
format->fmt.vbi.offset = 0;
format->fmt.vbi.flags = 0;
format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
format->fmt.vbi.count[0] = dev->vbi_height;
format->fmt.vbi.count[1] = dev->vbi_height;
/* Varies by video standard (NTSC, PAL, etc.) */
if (dev->norm & V4L2_STD_525_60) {
/* NTSC */
format->fmt.vbi.start[0] = 10;
format->fmt.vbi.start[1] = 273;
} else if (dev->norm & V4L2_STD_625_50) {
/* PAL */
format->fmt.vbi.start[0] = 6;
format->fmt.vbi.start[1] = 318;
}
return 0;
}
static int vidioc_s_fmt_vbi_cap(struct file *file, void *priv,
struct v4l2_format *format)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
format->fmt.vbi.samples_per_line = dev->vbi_width;
format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
format->fmt.vbi.offset = 0;
format->fmt.vbi.flags = 0;
format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
format->fmt.vbi.count[0] = dev->vbi_height;
format->fmt.vbi.count[1] = dev->vbi_height;
/* Varies by video standard (NTSC, PAL, etc.) */
if (dev->norm & V4L2_STD_525_60) {
/* NTSC */
format->fmt.vbi.start[0] = 10;
format->fmt.vbi.start[1] = 273;
} else if (dev->norm & V4L2_STD_625_50) {
/* PAL */
format->fmt.vbi.start[0] = 6;
format->fmt.vbi.start[1] = 318;
}
return 0;
}
static int vidioc_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *rb)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
return videobuf_reqbufs(&fh->vb_vidq, rb);
else
return videobuf_reqbufs(&fh->vb_vbiq, rb);
}
static int vidioc_querybuf(struct file *file, void *priv,
struct v4l2_buffer *b)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
return videobuf_querybuf(&fh->vb_vidq, b);
else {
/* FIXME: I'm not sure yet whether this is a bug in zvbi or
the videobuf framework, but we probably shouldn't be
returning a buffer larger than that which was asked for.
At a minimum, it causes a crash in zvbi since it does
a memcpy based on the source buffer length */
int result = videobuf_querybuf(&fh->vb_vbiq, b);
b->length = dev->vbi_width * dev->vbi_height * 2;
return result;
}
}
static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
return videobuf_qbuf(&fh->vb_vidq, b);
else
return videobuf_qbuf(&fh->vb_vbiq, b);
}
static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags &
O_NONBLOCK);
else
return videobuf_dqbuf(&fh->vb_vbiq, b, file->f_flags &
O_NONBLOCK);
}
/* ----------------------------------------------------------- */
/* RADIO ESPECIFIC IOCTLS */
/* ----------------------------------------------------------- */
static int radio_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
cap->capabilities = V4L2_CAP_TUNER;
return 0;
}
static int radio_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
if (unlikely(t->index > 0))
return -EINVAL;
strcpy(t->name, "Radio");
t->type = V4L2_TUNER_RADIO;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
return 0;
}
static int radio_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
if (i->index != 0)
return -EINVAL;
strcpy(i->name, "Radio");
i->type = V4L2_INPUT_TYPE_TUNER;
return 0;
}
static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
if (unlikely(a->index))
return -EINVAL;
strcpy(a->name, "Radio");
return 0;
}
static int radio_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
if (0 != t->index)
return -EINVAL;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
return 0;
}
static int radio_s_audio(struct file *file, void *fh,
struct v4l2_audio *a)
{
return 0;
}
static int radio_s_input(struct file *file, void *fh, unsigned int i)
{
return 0;
}
static int radio_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
int i;
if (qc->id < V4L2_CID_BASE ||
qc->id >= V4L2_CID_LASTP1)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(ac97_qctrl); i++) {
if (qc->id && qc->id == ac97_qctrl[i].id) {
memcpy(qc, &(ac97_qctrl[i]), sizeof(*qc));
return 0;
}
}
return -EINVAL;
}
/*
* em28xx_v4l2_open()
* inits the device and starts isoc transfer
*/
static int em28xx_v4l2_open(struct file *filp)
{
int errCode = 0, radio = 0;
struct video_device *vdev = video_devdata(filp);
struct em28xx *dev = video_drvdata(filp);
enum v4l2_buf_type fh_type = 0;
struct em28xx_fh *fh;
enum v4l2_field field;
switch (vdev->vfl_type) {
case VFL_TYPE_GRABBER:
fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
break;
case VFL_TYPE_VBI:
fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
break;
case VFL_TYPE_RADIO:
radio = 1;
break;
}
em28xx_videodbg("open dev=%s type=%s users=%d\n",
video_device_node_name(vdev), v4l2_type_names[fh_type],
dev->users);
fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
if (!fh) {
em28xx_errdev("em28xx-video.c: Out of memory?!\n");
return -ENOMEM;
}
fh->dev = dev;
fh->radio = radio;
fh->type = fh_type;
filp->private_data = fh;
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
em28xx_set_alternate(dev);
em28xx_resolution_set(dev);
/* Needed, since GPIO might have disabled power of
some i2c device
*/
em28xx_wake_i2c(dev);
}
if (fh->radio) {
em28xx_videodbg("video_open: setting radio device\n");
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
}
dev->users++;
if (dev->progressive)
field = V4L2_FIELD_NONE;
else
field = V4L2_FIELD_INTERLACED;
videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
NULL, &dev->slock,
V4L2_BUF_TYPE_VIDEO_CAPTURE, field,
sizeof(struct em28xx_buffer), fh, &dev->lock);
videobuf_queue_vmalloc_init(&fh->vb_vbiq, &em28xx_vbi_qops,
NULL, &dev->slock,
V4L2_BUF_TYPE_VBI_CAPTURE,
V4L2_FIELD_SEQ_TB,
sizeof(struct em28xx_buffer), fh, &dev->lock);
return errCode;
}
/*
* em28xx_realease_resources()
* unregisters the v4l2,i2c and usb devices
* called when the device gets disconected or at module unload
*/
void em28xx_release_analog_resources(struct em28xx *dev)
{
/*FIXME: I2C IR should be disconnected */
if (dev->radio_dev) {
if (video_is_registered(dev->radio_dev))
video_unregister_device(dev->radio_dev);
else
video_device_release(dev->radio_dev);
dev->radio_dev = NULL;
}
if (dev->vbi_dev) {
em28xx_info("V4L2 device %s deregistered\n",
video_device_node_name(dev->vbi_dev));
if (video_is_registered(dev->vbi_dev))
video_unregister_device(dev->vbi_dev);
else
video_device_release(dev->vbi_dev);
dev->vbi_dev = NULL;
}
if (dev->vdev) {
em28xx_info("V4L2 device %s deregistered\n",
video_device_node_name(dev->vdev));
if (video_is_registered(dev->vdev))
video_unregister_device(dev->vdev);
else
video_device_release(dev->vdev);
dev->vdev = NULL;
}
}
/*
* em28xx_v4l2_close()
* stops streaming and deallocates all resources allocated by the v4l2
* calls and ioctls
*/
static int em28xx_v4l2_close(struct file *filp)
{
struct em28xx_fh *fh = filp->private_data;
struct em28xx *dev = fh->dev;
int errCode;
em28xx_videodbg("users=%d\n", dev->users);
if (res_check(fh, EM28XX_RESOURCE_VIDEO)) {
videobuf_stop(&fh->vb_vidq);
res_free(fh, EM28XX_RESOURCE_VIDEO);
}
if (res_check(fh, EM28XX_RESOURCE_VBI)) {
videobuf_stop(&fh->vb_vbiq);
res_free(fh, EM28XX_RESOURCE_VBI);
}
if (dev->users == 1) {
/* the device is already disconnect,
free the remaining resources */
if (dev->state & DEV_DISCONNECTED) {
em28xx_release_resources(dev);
kfree(dev->alt_max_pkt_size);
kfree(dev);
return 0;
}
/* Save some power by putting tuner to sleep */
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
/* do this before setting alternate! */
em28xx_uninit_isoc(dev, EM28XX_ANALOG_MODE);
em28xx_set_mode(dev, EM28XX_SUSPEND);
/* set alternate 0 */
dev->alt = 0;
em28xx_videodbg("setting alternate 0\n");
errCode = usb_set_interface(dev->udev, 0, 0);
if (errCode < 0) {
em28xx_errdev("cannot change alternate number to "
"0 (error=%i)\n", errCode);
}
}
videobuf_mmap_free(&fh->vb_vidq);
videobuf_mmap_free(&fh->vb_vbiq);
kfree(fh);
dev->users--;
wake_up_interruptible_nr(&dev->open, 1);
return 0;
}
/*
* em28xx_v4l2_read()
* will allocate buffers when called for the first time
*/
static ssize_t
em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
loff_t *pos)
{
struct em28xx_fh *fh = filp->private_data;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
/* FIXME: read() is not prepared to allow changing the video
resolution while streaming. Seems a bug at em28xx_set_fmt
*/
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
if (res_locked(dev, EM28XX_RESOURCE_VIDEO))
return -EBUSY;
return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
filp->f_flags & O_NONBLOCK);
}
if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
if (!res_get(fh, EM28XX_RESOURCE_VBI))
return -EBUSY;
return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
filp->f_flags & O_NONBLOCK);
}
return 0;
}
/*
* em28xx_v4l2_poll()
* will allocate buffers when called for the first time
*/
static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
{
struct em28xx_fh *fh = filp->private_data;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
if (!res_get(fh, EM28XX_RESOURCE_VIDEO))
return POLLERR;
return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
} else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
if (!res_get(fh, EM28XX_RESOURCE_VBI))
return POLLERR;
return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
} else {
return POLLERR;
}
}
/*
* em28xx_v4l2_mmap()
*/
static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct em28xx_fh *fh = filp->private_data;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
(unsigned long)vma->vm_start,
(unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
rc);
return rc;
}
static const struct v4l2_file_operations em28xx_v4l_fops = {
.owner = THIS_MODULE,
.open = em28xx_v4l2_open,
.release = em28xx_v4l2_close,
.read = em28xx_v4l2_read,
.poll = em28xx_v4l2_poll,
.mmap = em28xx_v4l2_mmap,
.unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops video_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
.vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
.vidioc_s_fmt_vbi_cap = vidioc_s_fmt_vbi_cap,
.vidioc_enum_framesizes = vidioc_enum_framesizes,
.vidioc_g_audio = vidioc_g_audio,
.vidioc_s_audio = vidioc_s_audio,
.vidioc_cropcap = vidioc_cropcap,
.vidioc_g_fmt_sliced_vbi_cap = vidioc_g_fmt_sliced_vbi_cap,
.vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
.vidioc_s_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
.vidioc_reqbufs = vidioc_reqbufs,
.vidioc_querybuf = vidioc_querybuf,
.vidioc_qbuf = vidioc_qbuf,
.vidioc_dqbuf = vidioc_dqbuf,
.vidioc_g_std = vidioc_g_std,
.vidioc_querystd = vidioc_querystd,
.vidioc_s_std = vidioc_s_std,
.vidioc_g_parm = vidioc_g_parm,
.vidioc_s_parm = vidioc_s_parm,
.vidioc_enum_input = vidioc_enum_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_queryctrl = vidioc_queryctrl,
.vidioc_g_ctrl = vidioc_g_ctrl,
.vidioc_s_ctrl = vidioc_s_ctrl,
.vidioc_streamon = vidioc_streamon,
.vidioc_streamoff = vidioc_streamoff,
.vidioc_g_tuner = vidioc_g_tuner,
.vidioc_s_tuner = vidioc_s_tuner,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = vidioc_g_register,
.vidioc_s_register = vidioc_s_register,
.vidioc_g_chip_ident = vidioc_g_chip_ident,
#endif
};
static const struct video_device em28xx_video_template = {
.fops = &em28xx_v4l_fops,
.release = video_device_release,
.ioctl_ops = &video_ioctl_ops,
.tvnorms = V4L2_STD_ALL,
.current_norm = V4L2_STD_PAL,
};
static const struct v4l2_file_operations radio_fops = {
.owner = THIS_MODULE,
.open = em28xx_v4l2_open,
.release = em28xx_v4l2_close,
.unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops radio_ioctl_ops = {
.vidioc_querycap = radio_querycap,
.vidioc_g_tuner = radio_g_tuner,
.vidioc_enum_input = radio_enum_input,
.vidioc_g_audio = radio_g_audio,
.vidioc_s_tuner = radio_s_tuner,
.vidioc_s_audio = radio_s_audio,
.vidioc_s_input = radio_s_input,
.vidioc_queryctrl = radio_queryctrl,
.vidioc_g_ctrl = vidioc_g_ctrl,
.vidioc_s_ctrl = vidioc_s_ctrl,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = vidioc_g_register,
.vidioc_s_register = vidioc_s_register,
#endif
};
static struct video_device em28xx_radio_template = {
.name = "em28xx-radio",
.fops = &radio_fops,
.ioctl_ops = &radio_ioctl_ops,
};
/******************************** usb interface ******************************/
static struct video_device *em28xx_vdev_init(struct em28xx *dev,
const struct video_device *template,
const char *type_name)
{
struct video_device *vfd;
vfd = video_device_alloc();
if (NULL == vfd)
return NULL;
*vfd = *template;
vfd->v4l2_dev = &dev->v4l2_dev;
vfd->release = video_device_release;
vfd->debug = video_debug;
vfd->lock = &dev->lock;
/* Locking in file operations other than ioctl should be done
by the driver, not the V4L2 core.
This driver needs auditing so that this flag can be removed. */
set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
snprintf(vfd->name, sizeof(vfd->name), "%s %s",
dev->name, type_name);
video_set_drvdata(vfd, dev);
return vfd;
}
int em28xx_register_analog_devices(struct em28xx *dev)
{
u8 val;
int ret;
unsigned int maxw;
printk(KERN_INFO "%s: v4l2 driver version %s\n",
dev->name, EM28XX_VERSION);
/* set default norm */
dev->norm = em28xx_video_template.current_norm;
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
dev->interlaced = EM28XX_INTERLACED_DEFAULT;
/* Analog specific initialization */
dev->format = &format[0];
maxw = norm_maxw(dev);
/* MaxPacketSize for em2800 is too small to capture at full resolution
* use half of maxw as the scaler can only scale to 50% */
if (dev->board.is_em2800)
maxw /= 2;
em28xx_set_video_format(dev, format[0].fourcc,
maxw, norm_maxh(dev));
video_mux(dev, 0);
/* Audio defaults */
dev->mute = 1;
dev->volume = 0x1f;
/* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
em28xx_write_reg(dev, EM28XX_R0F_XCLK,
(EM28XX_XCLK_AUDIO_UNMUTE | val));
em28xx_set_outfmt(dev);
em28xx_colorlevels_set_default(dev);
em28xx_compression_disable(dev);
/* allocate and fill video video_device struct */
dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
if (!dev->vdev) {
em28xx_errdev("cannot allocate video_device.\n");
return -ENODEV;
}
/* register v4l2 video video_device */
ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
video_nr[dev->devno]);
if (ret) {
em28xx_errdev("unable to register video device (error=%i).\n",
ret);
return ret;
}
/* Allocate and fill vbi video_device struct */
if (em28xx_vbi_supported(dev) == 1) {
dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
"vbi");
/* register v4l2 vbi video_device */
ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
vbi_nr[dev->devno]);
if (ret < 0) {
em28xx_errdev("unable to register vbi device\n");
return ret;
}
}
if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
"radio");
if (!dev->radio_dev) {
em28xx_errdev("cannot allocate video_device.\n");
return -ENODEV;
}
ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
radio_nr[dev->devno]);
if (ret < 0) {
em28xx_errdev("can't register radio device\n");
return ret;
}
em28xx_info("Registered radio device as %s\n",
video_device_node_name(dev->radio_dev));
}
em28xx_info("V4L2 video device registered as %s\n",
video_device_node_name(dev->vdev));
if (dev->vbi_dev)
em28xx_info("V4L2 VBI device registered as %s\n",
video_device_node_name(dev->vbi_dev));
return 0;
}
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